EP4120311A1 - Active clogging of current leakage - Google Patents
Active clogging of current leakage Download PDFInfo
- Publication number
- EP4120311A1 EP4120311A1 EP22184283.4A EP22184283A EP4120311A1 EP 4120311 A1 EP4120311 A1 EP 4120311A1 EP 22184283 A EP22184283 A EP 22184283A EP 4120311 A1 EP4120311 A1 EP 4120311A1
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- current
- equipment
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- whose
- protective conductor
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
- H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for ac systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
- H01H2083/146—Provisions for avoiding disadvantages of having asymetrical primaries, e.g. induction of a magnetic field even by zero difference current
Definitions
- the invention relates to the field of electrical installations, electrical distribution, infrastructures equipped with electrical and electronic equipment
- This fraction of current flowing to earth can be broken down into two categories, each having a distinct origin: Leakage current and fault current.
- the leakage current is characterized by its low value and by its continuous presence in normal operation. This current often reflects the presence of electromagnetic filters in the equipment or even a capacitive coupling between one of the components of the equipment and its metal casing.
- the fault current can reach very high values. Appearing in an abnormal or accidental situation, it is revealed when an insulation problem appears in electrical equipment or in a wiring harness. Water penetration often induces this type of defect.
- a fault current can also appear unexpectedly in the event of direct contact such as the user touching an insufficiently insulated active electrical conductor.
- the differential protections are based on the measurement of the so-called “common mode” current, flowing simultaneously on the phase(s) and the neutral and looping back to earth. As a result, the protections do not differentiate between the leakage current of the equipment and a fault current potential. In any case, both having the same effect on the potential rise of the protective conductor PE, it is essential to carefully consider the sum of the two types of current at the level of the differential protection. Thus, the current of an electric line flowing towards the earth requires a continuous monitoring action going so far as to cause the tripping of the protection in the event of an excessive value measured, then causing the rapid disappearance of the supply voltage of the line. .
- the leakage current of a single piece of equipment, subject to strict standards, is generally well below the tripping limit of the installation, whereas the fault current can take on significant values depending on the nature of the fault causing tripping of the differential protection.
- the device according to the invention ensures the active plugging of the leakage current of one or more electrical equipment(s) present in an electrical installation, by neutralizing the rise of current towards upstream of the installation, thus making it possible to remedy the obligations and constraints set out above in the section "Presentation of the state of the prior art", by increasing the availability and the safety of the installation by avoiding the potential rise of the protective conductor PE as well as reinforcing user protection by reducing the tripping threshold of the upstream differential circuit breaker located at the head of the distribution line.
- the invention relates to an electronic device for plugging current leaks to earth from equipment or a group of equipment present in an electrical installation.
- the calibration of the differential protection tripping threshold of a distribution line depends directly on the number of connected devices and more particularly on the sum of the leakage currents of these devices. Indeed, the tripping threshold of this protection is selected within a range of values defined by a minimum corresponding to the sum of the leakage currents of the equipment in normal operation and a maximum corresponding to the maximum acceptable current value determined by the ratio between the maximum permissible voltage value for the protective conductor potential PE and the resistance value of the earth connection.
- the invention describes how contain the effect of this leakage current by totally or partially neutralizing it locally, thus avoiding the rise in potential of the protective conductor PE and limiting the necessary increase in the rating of the circuit breaker upstream of the installation. We will call this total or partial neutralization active current leakage plugging.
- the electronic device in [ Fig.1 ] intended to neutralize the leakage current flowing through the PE protective conductor (6 1 ) of any equipment or group of electrical equipment(s) (9) single-phase(s), two-phase(s) or three-phase(s), comprises a current sensor (1) encompassing the phase(s) and the neutral, a processing and filtering cell (2) ensuring the generation of a setpoint signal called 'setpoint' as well as the generation of an activation signal called “activation”.
- This processing and filtering cell (2) ensures that the voltage value of the setpoint signal is proportional to the measured current I MC or to its "setpoint" filtered value according to a 'low-pass' type filtering (2 2 ) and ensures the activation and deactivation of the neutralization of the leakage current flowing through the PE protective conductor (6 1 ) according to the amplitude of the "setpoint" signal via a hysteresis comparator (2 1 ),
- the device also comprises a non-isolated symmetrical DC voltage supply (3) whose input is connected to the single-phase, two-phase or three-phase electrical network (6) and whose output has two symmetrical DC voltages named "V HT + " and "V HT - ”, with respective values of +300 volts and -300 volts and referenced to neutral.
- the device also comprises an isolated symmetrical low voltage power supply (4), the input of which is connected to the electrical network (6) and the isolated output of which has 2 voltages "+V cc " and "-V cc ", of respective values + 15 volts and -15 volts and whose output ground is referenced to the PE protective conductor (6 1 ).
- the device finally comprises an electronic cell for injecting the clogging current “I c” (5) towards the PE protective conductor (6 1 ).
- This injected clogging current "I c " is slaved to the "setpoint" setpoint voltage by an amplification stage making it possible to reproduce across the terminals of resistor R 10 a value proportional to this input voltage, by means of a class AB amplifier assembly, consisting of an operational amplifier U1 in non-inverting assembly supplied between "+V cc " and "-V cc " whose positive input is connected to the "setpoint” signal via the resistor R2 with a value of 100kohm , whose negative input is connected to the potential of the protective conductor PE (6 1 ) via resistor R1 of 100kohm, whose counter reaction consists of a resistor R3 of 100kohm connecting its input negative and the midpoint of the output push-pull stage constituted by the connection between resistors R7 and R8 of twenty-two ohms each and switch S1, finally the output of said operational amplifier U1 of which is connected on the one hand at the cathod e of diode D1
- the source of energy for the injected clogging current "I c " towards the potential of the protective conductor PE (6 1 ) thus essentially comes from the supply voltages "V HT + " and "V HT - " taking into account the gains in significant current provided by the Sziclay assemblies of the push-pull stage.
- the measurement signal I MC from the current sensor (1) is processed by the low-pass filter (22) by applying it to the negative input of the operational amplifier Ual via resistor Ra1, amplifier Ual whose positive input is connected to the protective conductor PE (6 1 ) and whose output is connected to resistor Ra2 and to capacitor Ca1 mounted in counter-reaction to its negative input.
- the resulting “setpoint” signal present at the output of Ual is applied to a conversion block ensuring the transformation of its effective value into a proportional continuous value, by the use for example of the integrated circuit AD8436 or an equivalent.
- the injection of the clogging current "I c " is activated by the closing of the relay S 1 caused by the appearance of a voltage on its “activation” command when the rms amplitude of the filtered “setpoint” value of the current measured (1), goes below the threshold "S a ", and deactivated by the opening of the relay S 1 caused by the disappearance of voltage on its “activation” command when the effective amplitude of the filtered value "setpoint of the measured current (1) goes above a threshold "S b "
- the voltage value "V HT + " of 300 volts is determined so as to remain above the maximum potential of the protective conductor PE (6 1 ) and the voltage value "V HT " of -300 volts is determined so as to remain lower than the minimum potential of the PE protective conductor (6 1 ), in other words, the absolute value of the peak amplitude of the voltage between the neutral and the PE protective conductor (6 1 ) does not exceed 300 volts.
- a variant of the device consists in adding an additional differential circuit breaker (7) located between the current sensor (1) and any equipment or group of electrical equipment(s) (6)
- Another variant of the device consists in adding an additional differential circuit breaker (7) between the electrical network (6) upstream of the current sensor (1) and the isolated symmetrical power supply (3)
- Another variant of the device consists in placing the current sensor (1) in such a way that only the current passing through the PE protective conductor (6 1 ) connected to the equipment or to the group of electrical equipment(s) is measured ( 9). In this case, the connection of the device to the PE protective conductor (6 1 ) takes place upstream of the current sensor (1), towards the electrical network (6), so that the clogging current "I c" does not is not measured by the current sensor (1).
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Dans les installations électriques, la calibration du seuil de disjonction de la protection différentielle de la ligne de distribution dépend directement du nombre d'équipements connectés et des valeurs de courants de fuite à la terre de ces équipements. Pour conserver la disponibilité de l'installation, le niveau de sécurité peut se trouver relaxée et la dynamique autorisée pour l'impédance de la boucle de liaison à la terre doit être réduite dans le but d'éviter une montée excessive du potentiel du conducteur de protection auquel sont connectées les parties métalliques des équipements électriques. Le dispositif de colmatage selon l'invention consiste à déterminer en temps réel ainsi qu'à neutraliser tout ou partie du courant de fuite d'un équipement afin que celui-ci ne remonte pas vers la ligne de distribution, permettant ainsi de conserver un niveau de sécurité optimum.In electrical installations, the calibration of the differential protection tripping threshold of the distribution line depends directly on the number of devices connected and the earth leakage current values of these devices. To maintain the availability of the installation, the safety level can be relaxed and the dynamic authorized for the impedance of the earth connection loop must be reduced in order to avoid an excessive rise in the potential of the conductor of the earth. protection to which the metal parts of electrical equipment are connected. The clogging device according to the invention consists in determining in real time as well as neutralizing all or part of the leakage current of an item of equipment so that it does not rise towards the distribution line, thus making it possible to maintain a level optimum security.
Description
Domaine de l'invention : L'invention concerne le domaine des installations électriques, de la distribution électrique, des infrastructures dotées d'équipements électriques et électroniques Field of the invention : The invention relates to the field of electrical installations, electrical distribution, infrastructures equipped with electrical and electronic equipment
Exposé de l'art antérieur : Traditionnellement, la fraction de courant d'un équipement électrique circulant vers la terre, directement ou indirectement via le conducteur de protection dénommé PE pour 'Protective Earth' ou encore appelé conducteur de terre, est surveillée par une protection différentielle placée en tête de ligne. La protection différentielle permet entre autres mesures, d'éviter une montée excessive du potentiel de l'enveloppe métallique des équipements reliés au conducteur de protection, prévenant ainsi le risque d'électrisation, encore appelé risque de choc électrique par contact indirect, pour un utilisateur amené à utiliser un équipement électrique à enveloppe métallique d'une installation comportant un appareil défectueux. Presentation of the prior art : Traditionally, the fraction of current of electrical equipment flowing to earth, directly or indirectly via the protective conductor called PE for 'Protective Earth' or also called earth conductor, is monitored by a protection differential placed at the head of the line. The differential protection makes it possible, among other measures, to avoid an excessive rise in the potential of the metal casing of the equipment connected to the protective conductor, thus preventing the risk of electrification, also called risk of electric shock by indirect contact, for a user. required to use metal-enclosed electrical equipment in an installation with a faulty device.
Les normes et règlementations en vigueur fixent selon les différents cas d'usage, les valeurs limites, les seuils des paramètres électriques ou encore leurs combinaisons admissibles au niveau des équipements et des protections au tableau ainsi qu'au niveau de l'installation et de sa liaison à la terre. A titre d'exemple, sont rappelés ci- après quelques-uns de ces paramètres ainsi que leurs valeurs usuelles :
- Limite de la valeur du courant de fuite de l'équipement (exemple : 5 mA)
- Seuil de disjonction de la protection différentielle (exemple : 30 mA)
- Limite de la valeur maximale de la tension de l'enveloppe par rapport à la terre (exemple : 50 Volts)
- Valeur maximale de la résistance de connexion du conducteur de protection à la terre (exemple : 100 ohms)
- etc....
- Equipment leakage current value limit (example: 5 mA)
- Earth-leakage protection tripping threshold (example: 30 mA)
- Limit of the maximum value of the envelope voltage with respect to earth (example: 50 Volts)
- Maximum value of the connection resistance of the protective conductor to earth (example: 100 ohms)
- etc....
Cette fraction de courant circulant vers la terre peut se décomposer en deux catégories ayant chacune une origine distincte : Le courant de fuite et le courant de défaut.This fraction of current flowing to earth can be broken down into two categories, each having a distinct origin: Leakage current and fault current.
Le courant de fuite se caractérise par sa faible valeur et par sa présence continue en fonctionnement normal. Ce courant traduit souvent la présence de filtres électromagnétiques dans l'équipement ou encore un couplage capacitif entre un des composants de l'équipement et sa carcasse métallique.The leakage current is characterized by its low value and by its continuous presence in normal operation. This current often reflects the presence of electromagnetic filters in the equipment or even a capacitive coupling between one of the components of the equipment and its metal casing.
A l'inverse du courant de fuite, le courant de défaut peut atteindre des valeurs très importantes. Apparaissant en situation anormale ou accidentelle, il se révèle lors de l'apparition d'un problème d'isolement dans un équipement électrique ou dans un faisceau de câbles. La pénétration d'eau induit souvent ce type de défaut.Contrary to the leakage current, the fault current can reach very high values. Appearing in an abnormal or accidental situation, it is revealed when an insulation problem appears in electrical equipment or in a wiring harness. Water penetration often induces this type of defect.
Signalons également qu'un courant de défaut peut aussi apparaitre de façon intempestive en cas de contact direct comme le touché par l'utilisateur d'un conducteur électrique actif insuffisamment isolé. Afin de couvrir ce type de situation extrêmement critique, il est important de disposer d'une protection disposant d'une grande sensibilité ainsi que d'un délai de disjonction très faible, dans le but d'apporter la meilleure protection possible pour une personne qui serait ainsi exposée.It should also be noted that a fault current can also appear unexpectedly in the event of direct contact such as the user touching an insufficiently insulated active electrical conductor. In order to cover this type of extremely critical situation, it is important to have protection with high sensitivity as well as a very low tripping time, in order to provide the best possible protection for a person who would thus be exposed.
Les protections différentielles sont basées sur la mesure du courant dit « de mode commun », circulant simultanément sur la ou les phases et le neutre et se rebouclant vers la terre. De ce fait les protections ne font pas la différence entre le courant de fuite de l'équipement et un potentiel courant de défaut. De toute façon, l'un comme l'autre ayant le même effet sur la montée de potentiel du conducteur de protection PE, il est primordial de bien considérer la somme des deux types de courant au niveau de la protection différentielle. Ainsi, le courant d'une ligne électrique circulant vers la terre nécessite une action de surveillance continue allant jusqu'à provoquer la disjonction de la protection en cas de valeur excessive mesurée, entrainant alors la disparition rapide de la tension d'alimentation de la ligne.The differential protections are based on the measurement of the so-called “common mode” current, flowing simultaneously on the phase(s) and the neutral and looping back to earth. As a result, the protections do not differentiate between the leakage current of the equipment and a fault current potential. In any case, both having the same effect on the potential rise of the protective conductor PE, it is essential to carefully consider the sum of the two types of current at the level of the differential protection. Thus, the current of an electric line flowing towards the earth requires a continuous monitoring action going so far as to cause the tripping of the protection in the event of an excessive value measured, then causing the rapid disappearance of the supply voltage of the line. .
Le courant de fuite d'un équipement seul, soumis à des normes strictes, se situe généralement bien au-dessous de la limite de disjonction de l'installation, alors que le courant de défaut peut prendre selon la nature du défaut des valeurs importantes provoquant le déclenchement de la protection différentielle.The leakage current of a single piece of equipment, subject to strict standards, is generally well below the tripping limit of the installation, whereas the fault current can take on significant values depending on the nature of the fault causing tripping of the differential protection.
Dans le cas de plusieurs équipements connectés sur une même ligne de distribution comme illustré [
- D'adopter une impédance de boucle de la liaison à la terre le plus faible possible, pouvant s'avérer à l'extrême incompatible avec un régime TT ou IT
- De limiter in fine le nbre d'équipements de l'installation dans le but d'éviter une augmentation trop importante du potentiel du conducteur de protection (PE)
- De renforcer les barrières de protection mécaniques de la ligne de distribution amont afin de réduire l'exposition des personnes au risque d'électrisation par contact direct, la sensibilité de la protection amont s'avérant trop faible pour assurer la couverture même partielle de ce risque.
- To adopt the lowest possible earth connection loop impedance, which may prove to be extremely incompatible with a TT or IT system
- Ultimately limit the number of equipment in the installation in order to avoid an excessive increase in the potential of the protective conductor (PE)
- Reinforce the mechanical protection barriers of the upstream distribution line in order to reduce the exposure of people to the risk of electrification by direct contact, the sensitivity of the upstream protection proving too low to ensure even partial coverage of this risk .
Objectifs de l'invention : Le dispositif selon l'invention, assure le colmatage actif du courant de fuite d'un ou plusieurs équipement(s) électrique(s) présent(s) dans une installation électrique, en neutralisant la remontée de courant vers l'amont de l'installation, permettant ainsi de remédier aux obligations et contraintes exposées ci-avant à la section « exposé de l'état de l'art antérieur », en augmentant la disponibilité et la sécurité de l'installation en évitant la montée de potentiel du conducteur de protection PE ainsi qu'en renforçant la protection des utilisateurs en réduisant le seuil de disjonction du disjoncteur différentiel amont situé en tête de ligne de distribution. Objectives of the invention: The device according to the invention ensures the active plugging of the leakage current of one or more electrical equipment(s) present in an electrical installation, by neutralizing the rise of current towards upstream of the installation, thus making it possible to remedy the obligations and constraints set out above in the section "Presentation of the state of the prior art", by increasing the availability and the safety of the installation by avoiding the potential rise of the protective conductor PE as well as reinforcing user protection by reducing the tripping threshold of the upstream differential circuit breaker located at the head of the distribution line.
Avantages de l'invention : L'invention concerne un dispositif électronique de colmatage des fuites de courant vers la terre d'un équipement ou d'un groupe d'équipements présent(s) dans une installation électrique. La calibration du seuil de disjonction de la protection différentielle d'une ligne de distribution dépend directement du nombre d'équipements connectés et plus particulièrement de la somme des courants de fuite de ces équipements. En effet, le seuil de disjonction de cette protection est sélectionné dans une plage de valeurs définie par un minimum correspondant à la somme des courants de fuite des équipements en fonctionnement normal et un maximum correspondant à la valeur maximale acceptable de courant déterminé par le rapport entre la valeur maximale de tension admissible pour le potentiel du conducteur de protection PE et la valeur de résistance de la liaison à la terre. Il peut arriver que les contraintes physiques, de sécurité ou règlementaires ne permettent pas de trouver de solution obligeant alors l'installateur à revoir son architecture de distribution et de protection en augmentant le nbre de protections différentielles et/ou de revoir à la baisse la résistance de liaison à la terre de l'installation quand c'est possible. Dans tous les cas, la protection de la ligne de distribution se trouve d'autant plus affectée que la somme des courants de fuite des équipements est élevée. De même, le potentiel du conducteur de protection augmente avec la valeur de la somme des courants de fuite Advantages of the invention: The invention relates to an electronic device for plugging current leaks to earth from equipment or a group of equipment present in an electrical installation. The calibration of the differential protection tripping threshold of a distribution line depends directly on the number of connected devices and more particularly on the sum of the leakage currents of these devices. Indeed, the tripping threshold of this protection is selected within a range of values defined by a minimum corresponding to the sum of the leakage currents of the equipment in normal operation and a maximum corresponding to the maximum acceptable current value determined by the ratio between the maximum permissible voltage value for the protective conductor potential PE and the resistance value of the earth connection. It may happen that physical, safety or regulatory constraints make it impossible to find a solution, forcing the installer to review his distribution and protection architecture by increasing the number of differential protections and/or to revise the resistance downwards. connection to the ground of the installation when possible. In all cases, the protection of the distribution line is all the more affected as the sum of the leakage currents of the equipment is high. Similarly, the potential of the protective conductor increases with the value of the sum of the leakage currents
Pour remédier à ce problème, comme illustré en [
Mode de réalisation préféré de l'invention : Le dispositif électronique en [
Au sein de la cellule de traitement et de filtrage (2), le signal de mesure IMC issu du capteur de courant (1) est traité par le filtre passe-bas (22) en l'appliquant à l'entrée négative de l'ampli opérationnel Ual par l'intermédiaire de la résistance Ra1, ampli Ual dont l'entrée positive est reliée au conducteur de protection PE (61) et dont la sortie est reliée à la résistance Ra2 et au condensateur Ca1 montés en contre-réaction vers son entrée négative. Le signal résultant « consigne » présent à la sortie de Ual, est appliqué à un bloc de conversion assurant la transformation de sa valeur efficace en valeur continue proportionnelle, par l'utilisation par exemple du circuit intégré AD8436 ou d'un équivalent. La valeur continue résultante, image de la valeur efficace du signal « consigne » est appliquée à l'entrée négative du comparateur Ua2 par l'intermédiaire de la résistance Ra3, comparateur Ua2 dont l'entrée positive est reliée au pont diviseur constitué par Ra5 reliée au +Vcc et Ra4 reliée au potentiel du conducteur de protection PE (61) ainsi qu'à la résistance de réaction permettant l'hystérésis et reliée à sa sortie « activation ». Il en résulte deux seuils de basculement du comparateur nommés respectivement « Sa » et « Sb ». Comme indiqué sur la [
La valeur de tension « VHT + » de 300 volts est déterminée de façon à rester supérieure au potentiel maximum du conducteur de protection PE (61) et la valeur de tension « V HT » de -300 volts est déterminée de façon à rester inférieure au potentiel minimum du conducteur de protection PE (61), autrement dit, la valeur absolue de l'amplitude crête de la tension entre le neutre et le conducteur de protection PE (61) n'excède pas 300 volts.The voltage value "V HT + " of 300 volts is determined so as to remain above the maximum potential of the protective conductor PE (6 1 ) and the voltage value "V HT " of -300 volts is determined so as to remain lower than the minimum potential of the PE protective conductor (6 1 ), in other words, the absolute value of the peak amplitude of the voltage between the neutral and the PE protective conductor (6 1 ) does not exceed 300 volts.
Une variante du dispositif consiste à rajouter un disjoncteur différentiel additionnel (7) situé entre le capteur de courant (1) et l'équipement ou groupe d'équipements électrique(s) quelconque(s) (6)A variant of the device consists in adding an additional differential circuit breaker (7) located between the current sensor (1) and any equipment or group of electrical equipment(s) (6)
Une autre variante du dispositif consiste à rajouter un disjoncteur différentiel additionnel (7) entre le réseau électrique (6) en amont du capteur de courant (1) et de l'alimentation symétrique isolée (3)Another variant of the device consists in adding an additional differential circuit breaker (7) between the electrical network (6) upstream of the current sensor (1) and the isolated symmetrical power supply (3)
Une autre variante du dispositif consiste à placer le capteur de courant (1) de telle sorte que soit mesuré uniquement le courant traversant le conducteur de protection PE (61) relié à l'équipement ou au groupe d'équipements électrique(s) (9). Dans ce cas, la liaison du dispositif au conducteur de protection PE (61) s'effectue en amont du capteur de courant (1), vers le réseau électrique (6), de sorte que le courant de colmatage « Ic » ne soit pas mesuré par le capteur de courant (1).Another variant of the device consists in placing the current sensor (1) in such a way that only the current passing through the PE protective conductor (6 1 ) connected to the equipment or to the group of electrical equipment(s) is measured ( 9). In this case, the connection of the device to the PE protective conductor (6 1 ) takes place upstream of the current sensor (1), towards the electrical network (6), so that the clogging current "I c" does not is not measured by the current sensor (1).
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2107531A FR3125166B1 (en) | 2021-07-12 | 2021-07-12 | Active current leakage sealing |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4120311A1 true EP4120311A1 (en) | 2023-01-18 |
EP4120311C0 EP4120311C0 (en) | 2024-02-28 |
EP4120311B1 EP4120311B1 (en) | 2024-02-28 |
Family
ID=80225811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22184283.4A Active EP4120311B1 (en) | 2021-07-12 | 2022-07-12 | Active clogging of current leakage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP4120311B1 (en) |
FR (1) | FR3125166B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0320409A1 (en) * | 1987-12-10 | 1989-06-14 | Merlin Gerin | Static release with external supply |
EP3199959A1 (en) * | 2014-09-26 | 2017-08-02 | Tanashin Denki Co., Ltd. | Leakage current calculation device and leakage current calculation method |
FR3073330A1 (en) * | 2017-11-07 | 2019-05-10 | Hager-Electro Sas | DIFFERENTIAL PROTECTION DEVICE USING THE RECTIFIED MEDIUM VOLTAGE |
-
2021
- 2021-07-12 FR FR2107531A patent/FR3125166B1/en not_active Expired - Fee Related
-
2022
- 2022-07-12 EP EP22184283.4A patent/EP4120311B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0320409A1 (en) * | 1987-12-10 | 1989-06-14 | Merlin Gerin | Static release with external supply |
EP3199959A1 (en) * | 2014-09-26 | 2017-08-02 | Tanashin Denki Co., Ltd. | Leakage current calculation device and leakage current calculation method |
FR3073330A1 (en) * | 2017-11-07 | 2019-05-10 | Hager-Electro Sas | DIFFERENTIAL PROTECTION DEVICE USING THE RECTIFIED MEDIUM VOLTAGE |
Also Published As
Publication number | Publication date |
---|---|
FR3125166B1 (en) | 2023-06-09 |
FR3125166A1 (en) | 2023-01-13 |
EP4120311C0 (en) | 2024-02-28 |
EP4120311B1 (en) | 2024-02-28 |
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